Sumbawa is 15,448 km2 or 5,965 sq mi (three times the size o Lombok) wi a current population o aroond 1.33 million. It marks the boundary atween the islands tae the west, which wur influenced bi releegion an cultur spreadin frae Indie, an the region tae the east that wis nae so influenced. In pairticular this applies tae baith Hinduism an Islam.